#include<iostream>
using namespace std;
int n1 = 5,n2 = 10;
void Function1()
{
	int n3 = 4;      //n3局部变量;
	n2 = 3;
}
void Function2()
{
	int n4;
	n1 = 4;
	n3 = 5;
}
int main()
{
	n2 = 1;
	int n5;
	int n2;
	if(n1 == 5){
		int n6;
		n6 = 8;
	}
	n1 = 6;
	n4 = 1;
	n6 = 9;
	n2 = 7;
	::n2 = 9;
	return 0;
}